I tried solving it the following way using the FieldValidatorSource service:

<t:textfield t:id="someField" t:value="someValue" t:validate="prop:someFieldValidate" />

public FieldValidator<Object> getSomeFieldValidate() {

        StringBuilder validate = new StringBuilder()

return fieldValidatorSource.createValidators(someField, validate.toString());

But now I have a problem when SOME_REGEXP contains a space character it throws following error:


*Unexpected character ']' at position 26 of input string: required,regexp=^[A-ΓΏ'\- ]*$*

org.apache.tapestry5.internal.services.FieldValidatorSourceImpl parseError() FieldValidatorSourceImpl.java 422 org.apache.tapestry5.internal.services.FieldValidatorSourceImpl parse() FieldValidatorSourceImpl.java 381 org.apache.tapestry5.internal.services.FieldValidatorSourceImpl toValidatorSpecifications() FieldValidatorSourceImpl.java 199 org.apache.tapestry5.internal.services.FieldValidatorSourceImpl createValidators() FieldValidatorSourceImpl.java 182


I used this same regexp value in the @Validate annotation before without problems, but with my method above it gives the above parsing error.

Anyone know how I can solve the above problem?


On 15/09/16 16:20, Nathan Quirynen wrote:

I want to use the @Validate annotation, but I cannot put it at the value properties, because these properties are part of a DTO object that is part of a library. In the documentation (http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/beaneditor/Validate.html) I found the following: " May be placed on any getter or setter method, or on the matching field".

So I thought I could do the following:

private Field someField;

But this does not seem to work?

Is there any other way to add validators to a field programatically when you have no access to the property declarations? I could do all validation myself in the onValidate event, but this does not seem optimal.


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